Finding the Fourth Proportional to 9,920.48, 13,690.22 and 5,444.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,920.48 : 13,690.22 = 5,444.31 : x
2. Step 2: Convert to fraction form
   9,920.48/13,690.22 = 5,444.31/x
3. Step 3: Cross multiply
   9,920.48x = 13,690.22 × 5,444.31
4. Step 4: Simplify right side
   9,920.48x = 74,533,743.50
5. Step 5: Solve for x
   x = 74,533,743.50/9,920.48
6. Step 6: Final answer
   x = 7,513.12